Use explicit WebString <-> string16 conversion methods in storage API files

content/child/indexed_db/indexed_db_database_callbacks_impl.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/child/indexed_db/indexed_db_database_callbacks_impl.h"
 
 #include "content/child/indexed_db/indexed_db_dispatcher.h"
 #include "content/child/indexed_db/indexed_db_key_builders.h"
 #include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBDatabaseCallbacks.h"
 #include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBDatabaseError.h"
 #include "third_party/WebKit/public/platform/modules/indexeddb/WebIDBObservation.h"
 
 using blink::WebIDBDatabaseCallbacks;
 
 namespace content {
 
 namespace {
 
 void DeleteDatabaseCallbacks(WebIDBDatabaseCallbacks* callbacks) {
   IndexedDBDispatcher::ThreadSpecificInstance()
       ->UnregisterMojoOwnedDatabaseCallbacks(callbacks);
   delete callbacks;
 }
 
 void BuildErrorAndAbort(WebIDBDatabaseCallbacks* callbacks,
                         int64_t transaction_id,
                         int32_t code,
                         const base::string16& message) {
-  callbacks->onAbort(transaction_id, blink::WebIDBDatabaseError(code, message));
+  callbacks->onAbort(
+      transaction_id,
+      blink::WebIDBDatabaseError(code, blink::WebString::fromUTF16(message)));
 }
 
 void BuildObservationsAndNotify(WebIDBDatabaseCallbacks* callbacks,
                                 indexed_db::mojom::ObserverChangesPtr changes) {
   std::vector<blink::WebIDBObservation> web_observations;
   for (const auto& observation : changes->observations) {
     blink::WebIDBObservation web_observation;
     web_observation.objectStoreId = observation->object_store_id;
     web_observation.type = observation->type;
     web_observation.keyRange =
@@ skipping 50 matching lines @@
 }
 
 void IndexedDBDatabaseCallbacksImpl::Changes(
     indexed_db::mojom::ObserverChangesPtr changes) {
   callback_runner_->PostTask(FROM_HERE, base::Bind(&BuildObservationsAndNotify,
                                                    base::Unretained(callbacks_),
                                                    base::Passed(&changes)));
 }
 
 }  // namespace content